If you have access to it, grab the ecu, wiring harness, head with manifolds, and the tranny from the Y8, and re-use your Y7 bottom end to make a mini-me, higher compression, better torque, and still runs on regular gas. It's the best all-factory-parts D-series out there IMO.

Since you'd be using the Y8 head/IM, wiring harness and ecu, you shouldn't need to run any additional wires for the vtec, or deal with the iacv.